The title is misleading. The extent of Indian contribution to the development of the FGFA has not even been determined, and the Russians are already flying a prototype and likely have the majority of their future development plans in place already. India is essentially just subsidizing the cost of continued development of the program, for the rights to add the term 'Indo' to 'Indo-Russian FGFA', and at best, at this time, it would appear that all India will do is perform another MKI on a Russian jet, perhaps with more Indian components instead of Israeli or European, and that is optimistic. Where can India offer technological expertise? Airframe? Engines? Flight Controls? Radar? In all of those areas the Russians are way ahead of India.
Even the Indian contribution to avionics (on the Indian version of the FGFA) is likely going to be primarily based on American/European/Israeli technology transferred to India under the MMRCA contract (whoever the winner ends up being), with minimal 'pure indigenous' contribution.
Joining any project this late in the game leaves little room for technological contributions by the junior partner, especially when the junior partner is far less technologically advanced than the senior partner- u are only fooling yourself if you think otherwise.